431004240 has 120 divisors (see below), whose sum is σ = 1501133088. Its totient is φ = 114929280.

The previous prime is 431004209. The next prime is 431004251. The reversal of 431004240 is 42400134.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8355 + ... + 30525.

Almost surely, 2^431004240 is an apocalyptic number.

431004240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431004240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750566544).

431004240 is an abundant number, since it is smaller than the sum of its proper divisors (1070128848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431004240 is a wasteful number, since it uses less digits than its factorization.

431004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22199 (or 22181 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 431004240 is about 20760.6416085823. The cubic root of 431004240 is about 755.3713594944.

Adding to 431004240 its reverse (42400134), we get a palindrome (473404374).

The spelling of 431004240 in words is "four hundred thirty-one million, four thousand, two hundred forty".